last sync: 2021-May-14 16:08:20 UTC

Azure Policy definition

Kubernetes cluster services should listen only on allowed ports

Name Kubernetes cluster services should listen only on allowed ports
Azure Portal
Id 233a2a17-77ca-4fb1-9b6b-69223d272a44
Version 6.1.0
details on versioning
Category Kubernetes
Microsoft docs
Description Restrict services to listen only on allowed ports to secure access to the Kubernetes cluster. This policy is generally available for Kubernetes Service (AKS), and preview for AKS Engine and Azure Arc enabled Kubernetes. For more information, see https://aka.ms/kubepolicydoc.
Mode Microsoft.Kubernetes.Data
Type BuiltIn
Preview FALSE
Deprecated FALSE
Effect Default: deny
Allowed: (audit, deny, disabled)
Used RBAC Role none
History
Date/Time (UTC ymd) (i) Change type Change detail
2021-03-09 14:37:41 change Minor (6.0.0 > 6.1.0)
2021-03-02 15:11:40 change Major (5.0.1 > 6.0.0)
2020-12-11 15:42:52 change Major (4.0.1 > 5.0.1)
2020-09-15 14:06:41 change Previous DisplayName: [Preview]: Ensure services listen only on allowed ports in Kubernetes cluster
2020-04-23 15:06:19 change Previous DisplayName: [Preview]: [AKS Engine] Ensure services listen only on allowed ports in Kubernetes cluster
2019-10-29 23:04:36 add 233a2a17-77ca-4fb1-9b6b-69223d272a44
Used in Initiatives
Initiative DisplayName Initiative Id Initiative Category State
[Deprecated]: Azure Security Benchmark v2 bb522ac1-bc39-4957-b194-429bcd3bcb0b Regulatory Compliance Deprecated
Azure Security Benchmark 1f3afdf9-d0c9-4c3d-847f-89da613e70a8 Security Center GA
JSON Changes

JSON
{
  "properties": {
    "displayName": "Kubernetes cluster services should listen only on allowed ports",
    "policyType": "BuiltIn",
    "mode": "Microsoft.Kubernetes.Data",
    "description": "Restrict services to listen only on allowed ports to secure access to the Kubernetes cluster. This policy is generally available for Kubernetes Service (AKS), and preview for AKS Engine and Azure Arc enabled Kubernetes. For more information, see https://aka.ms/kubepolicydoc.",
    "metadata": {
      "version": "6.1.0",
      "category": "Kubernetes"
    },
    "parameters": {
      "effect": {
        "type": "String",
        "metadata": {
          "displayName": "Effect",
          "description": "'Audit' allows a non-compliant resource to be created, but flags it as non-compliant. 'Deny' blocks the resource creation. 'Disable' turns off the policy."
        },
        "allowedValues": [
          "audit",
          "deny",
          "disabled"
        ],
        "defaultValue": "deny"
      },
      "excludedNamespaces": {
        "type": "Array",
        "metadata": {
          "displayName": "Namespace exclusions",
          "description": "List of Kubernetes namespaces to exclude from policy evaluation."
        },
        "defaultValue": [
          "kube-system",
          "gatekeeper-system",
          "azure-arc"
        ]
      },
      "namespaces": {
        "type": "Array",
        "metadata": {
          "displayName": "Namespace inclusions",
          "description": "List of Kubernetes namespaces to only include in policy evaluation. An empty list means the policy is applied to all resources in all namespaces."
        },
        "defaultValue": [
          
        ]
      },
      "labelSelector": {
        "type": "Object",
        "metadata": {
          "displayName": "Kubernetes label selector",
          "description": "Label query to select Kubernetes resources for policy evaluation. An empty label selector matches all Kubernetes resources."
        },
        "defaultValue": {
          
        }
      },
      "allowedServicePortsList": {
        "type": "Array",
        "metadata": {
          "displayName": "Allowed service ports list",
          "description": "The list of service ports allowed in a Kubernetes cluster."
        }
      }
    },
    "policyRule": {
      "if": {
        "field": "type",
        "in": [
          "AKS Engine",
          "Microsoft.Kubernetes/connectedClusters",
          "Microsoft.ContainerService/managedClusters"
        ]
      },
      "then": {
      "effect": "[parameters('effect')]",
        "details": {
          "constraintTemplate": "https://store.policy.core.windows.net/kubernetes/service-allowed-ports/v1/template.yaml",
          "constraint": "https://store.policy.core.windows.net/kubernetes/service-allowed-ports/v1/constraint.yaml",
        "excludedNamespaces": "[parameters('excludedNamespaces')]",
        "namespaces": "[parameters('namespaces')]",
        "labelSelector": "[parameters('labelSelector')]",
          "values": {
          "allowedServicePorts": "[parameters('allowedServicePortsList')]",
          "allowedPorts": "[parameters('allowedServicePortsList')]"
          }
        }
      }
    }
  },
  "id": "/providers/Microsoft.Authorization/policyDefinitions/233a2a17-77ca-4fb1-9b6b-69223d272a44",
  "type": "Microsoft.Authorization/policyDefinitions",
  "name": "233a2a17-77ca-4fb1-9b6b-69223d272a44"
}